In 2003-2007 he was head of Theology & Tutor for Graduates; Fellow in Patristic Theology and Early Church History, Greyfriars Hall, University of Oxford.

In 2003-2007 he was head of Theology & Tutor for Graduates; Fellow in Patristic Theology and Early Church History, Greyfriars Hall, University of Oxford.

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He was [[ordination|ordained]] a [[deacon]] on [[August 15]]/[[August 28]](os), 2007 in London by [[Bishop]] [[Elisey (Ganaba) of Sourozh|Elisey of Bogorodsk]]. He served as deacon for the [[Diocese of Sourozh]].

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He was [[ordination|ordained]] a [[deacon]] on [[August 28]] (os [[August 15]]), 2007 in London by [[Bishop]] [[Elisey (Ganaba) of Sourozh|Elisey of Bogorodsk]]. He served as deacon for the [[Diocese of Sourozh]].

In 2007-2010 he was Chair of Theology and Religious Studies, Leeds Trinity University College.

In 2007-2010 he was Chair of Theology and Religious Studies, Leeds Trinity University College.

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On [[March 14]] ([[March 1]] os), 2010 hierodeacon Irenaeus was ordained a [[priest]] at the Holy Virgin Cathedral in San Francisco by Archbishop Kyrill of San Francisco and Western America.

On [[March 14]] ([[March 1]] os), 2010 hierodeacon Irenaeus was ordained a [[priest]] at the Holy Virgin Cathedral in San Francisco by Archbishop Kyrill of San Francisco and Western America.

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Since March 2010 he is Visiting Professor in Orthodox Christian Studies, Santa Clara University.

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Since 2000 he is Professorial Research Fellow in Theology, Leeds Trinity University College.

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Since 2011 he is dean and Founder of the Sts Cyril & Athanasius Institute for Orthodox Studies, San Francisco.

On August 26 ([[August 13]] os), 2011 at the Divine Liturgy on the occasion of the feastday of St. Tikhon's Church in San Francisco, Archbishop Kyrill of San Francisco and Western America elevated Hieromonk Irenaeus to the rank of [[archimandrite]] and lay the [[mitre]] upon his head<ref>http://www.wadiocese.com/enews.php?id=C20_103_14</ref>.

On August 26 ([[August 13]] os), 2011 at the Divine Liturgy on the occasion of the feastday of St. Tikhon's Church in San Francisco, Archbishop Kyrill of San Francisco and Western America elevated Hieromonk Irenaeus to the rank of [[archimandrite]] and lay the [[mitre]] upon his head<ref>http://www.wadiocese.com/enews.php?id=C20_103_14</ref>.

In 2007-2010 he was Chair of Theology and Religious Studies, Leeds Trinity University College.

He moved to San Francisco from England. January 2010 Archbishop Kyrill of San Francisco and Western America has received Deacon Matthew Steenberg into the ranks of clergy of the Western American Diocese from the Diocese of Sourozh and assigned him to the St. Tikohon's of Zadonsk Church in San Francisco and as the new principal of St. John of San Francisco Orthodox Academy in San Francisco[2][3].

On March 14 (March 1 os), 2010 hierodeacon Irenaeus was ordained a priest at the Holy Virgin Cathedral in San Francisco by Archbishop Kyrill of San Francisco and Western America.

Since March 2010 he is Visiting Professor in Orthodox Christian Studies, Santa Clara University.

Since 2000 he is Professorial Research Fellow in Theology, Leeds Trinity University College.

Since 2011 he is dean and Founder of the Sts Cyril & Athanasius Institute for Orthodox Studies, San Francisco.

On August 26 (August 13 os), 2011 at the Divine Liturgy on the occasion of the feastday of St. Tikhon's Church in San Francisco, Archbishop Kyrill of San Francisco and Western America elevated Hieromonk Irenaeus to the rank of archimandrite and lay the mitre upon his head[4].

‘Gnomic will and a challenge to the true humanity of Christ in Maximus Confessor’, Studia Patristica 42 (2006) 237-242.

‘Self and the Church: A review of E. Moore’s “Defining Orthodoxy: Is it Possible?”’, Theandros: An Online Journal of Orthodox Christian Theology and Philosophy <www.theandros.com> 1/1 (September 2003).

‘Rediscovering Old Testament Christianity’, Again 23.3 (2001) 4-11.

Introductory Studies

A World Full of Arians

Epinoia & Ennoia: The Cappadocian Fathers on essence/energy and the human knowledge of God

Modelling the Trinity after the man: Human nature and the Trinity in the Cappadocian Epistle 38